Nanguo pear is a distinctive pear variety in northeast China, grown mainly in mountainous areas. Due to terrain limitations, ground-based pesticide application equipment is difficult to use. This limitation could be overcome by using unmanned aerial vehicles (UAVs) for pesticide application in Nanguo pear orchards. This study evaluated the spraying performance of two UAVs in the Nanguo pear orchards and compared them with a manually used backpack electric sprayer (BES). The study also analyzed the effect of canopy size on droplet deposition and ground loss, and evaluated two sampling methods, leaf sampling and telescopic rod sampling.

中文翻译：

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南国山区梨园无人机喷施效果评价

南国梨是我国东北地区特色梨品种，主要产于山区。由于地形限制，地面施药设备使用起来比较困难。通过在南国梨园使用无人机施药可以克服这一限制。本研究评估了南国梨园中两种无人机的喷洒性能，并与手动使用的背负式电动喷雾机（BES）进行了比较。该研究还分析了冠层尺寸对液滴沉积和地面损失的影响，并评估了两种采样方法：叶子采样和伸缩杆采样。